To prevent displacement of a cutting position of a card.

This card making system includes a card printing system to which card information D to be shown on the card 5 is inputted and which makes printing information E on the basis of the card information and prints it by a printer, and a card cutter 6 which includes, in its constitution, a cutter mechanism 60 for cutting printed paper 4 while conveying it. In the printing information, a cut mark 18 indicating the edge part of an upper card region R1 to be located at the tip in the direction of conveyance in the card cutter is included, and the mark shaped like a straight line is printed on the paper together with the card information. The card cutter is equipped with a sensor which detects the cut mark printed on the paper and a state of deviation thereof, and cutting work by the cutter mechanism 60 is started when the sensor detects the cut mark, while the direction of the paper is finely adjusted according to a detected deviation amount.